diff --git a/backend/scripts/repl b/backend/scripts/repl
index 32fd12d42..3c8b1a6c6 100755
--- a/backend/scripts/repl
+++ b/backend/scripts/repl
@@ -2,7 +2,9 @@
 
 export PENPOT_ASSERTS_ENABLED=true
 
-export OPTIONS="-A:jmx-remote:dev -J-Djava.util.logging.manager=org.apache.logging.log4j.jul.LogManager -J-Xms512m -J-Xmx512m -J-Dlog4j2.configurationFile=log4j2-devenv.xml"
+export OPTIONS="-A:jmx-remote:dev -J-Djava.util.logging.manager=org.apache.logging.log4j.jul.LogManager -J-Xms512m -J-Xmx512m -J-Dlog4j2.configurationFile=log4j2-devenv.xml";
+# export OPTIONS="$OPTIONS -J-XX:+UnlockDiagnosticVMOptions";
+# export OPTIONS="$OPTIONS -J-XX:-TieredCompilation -J-XX:CompileThreshold=10000";
 
 export OPTIONS_EVAL="nil"
 # export OPTIONS_EVAL="(set! *warn-on-reflection* true)"
diff --git a/docker/devenv/Dockerfile b/docker/devenv/Dockerfile
index 9e90ed04d..f7e2eebdc 100644
--- a/docker/devenv/Dockerfile
+++ b/docker/devenv/Dockerfile
@@ -6,7 +6,7 @@ ARG DEBIAN_FRONTEND=noninteractive
 ENV NODE_VERSION=v14.16.1 \
     CLOJURE_VERSION=1.10.3.822 \
     CLJKONDO_VERSION=2021.04.23 \
-    BABASHKA_VERSION=0.3.5 \
+    BABASHKA_VERSION=0.4.0 \
     LANG=en_US.UTF-8 \
     LC_ALL=en_US.UTF-8